The last government staff occupied the building in the late 1990s.
Most have moved and the building is now about 65 percent occupied.
The current building was first occupied in the 2005-2006 school year.
The science department also occupied the building at this time.
No one had known the building was occupied at this hour.
The students continued to occupy the building last night, and university officials said they would not force them out.
However, three years after it opened, the building was only 30 percent occupied.
The building was occupied by the bank in March 1901.
When occupying a building, try not to stay too long.
Eventually the two companies may occupy the entire 21-story building.